... anytime and anywhere. When it connects, you can monitor the sound around 5 meter. Real-time location ... Government staff: patrolling policeman, security guarder, road administration staff. Personal management: outdoor workers, climber, tourist, source explorer, studernt, ... Specialfication Outline dimensions66mm ×60mm ×20mm ( length × width x thickness )Quality<80g (including standard 1200mAH/3.7V Lithium ...